Narrative:Crashed into a mountain at an elevation of about 2,500 feet. Weather was poor . The aircraft, flying in a northerly direction, had descended into mountainous terrain at a 10-degree angle, clipped trees, struck the ground, broke up and burned.

PROBABLE CAUSE: "Failure of the captain to determine his position accurately before descending to a dangerously low altitude under extremely poor weather conditions during the hours of darkness."